Digital Commons Network^™

Do #Blm At The Plantation: A Study Of Plantation Tourism After The Racial Reckoning Of 2020, Denetria N. Lee

LSU Master's Theses

Following the murder of George Floyd at the hands of Minneapolis police officer Derek Chauvin, the widespread public protest of racial injustice created a groundswell that prompted corporate and media responses, so much so that by the end of the summer of 2020, it seemed as if "Black Lives Mattered" everywhere and to everyone. Public response incentivized subsequent corporate response in financial pledges and other commitments to racial justice initiatives until 2020, which became known as the year that America confronted racism or the racial reckoning of 2020. While the public demanded acknowledgment of the many forms of contemporary racial …

Resource Harvesting For Parallel Functions In Serverless Workflows, Peiman Fotouhi

LSU Master's Theses

In the rapidly evolving landscape of cloud computing, serverless architectures have gained attention for their scalability and cost-effectiveness. This thesis aims to introduce a novel approach to maximize resource utilization in serverless environments through the concept of harvesting idle resources within Directed Acyclic Graph (DAG)-based workloads. Our proposed solution targets resource harvesting at parallel stages by utilizing Machine Learning models to accurately harvest or accelerate serverless functions. Additionally, we present a scheduling algorithm specifically designed to address the unique requirements of DAG workloads in cloud environments.

The framework leverages dynamic resource allocation techniques to identify and exploit idle resources within …

Effects Of Retinal Gonadotropin-Releasing Hormone On Reproductive Behavior And Retinal Activity In The Cichlid Fish, Astatotilapia Burtoni, Chase Anselmo

LSU Master's Theses

Many animals use visual signals to evade predators, forage for food, and communicate with conspecifics. Some animals that shift into and out of breeding stages, such as fish, can modulate their visual sensitivity to better adapt to changing internal and external conditions. Previous work in our lab demonstrated that females of the cichlid fish Astatotilapia burtoni have improved visual sensitivity when they enter reproductive readiness. However, little is known about how fish and vertebrates more broadly modulate visual sensitivity across their reproductive cycle. We hypothesized that the hormone and neuromodulator gonadotropin-releasing hormone (GnRH) could modulate visual sensitivity because GnRH is …

Exploring The Efficacy Of Transcutaneous Auricular Vagal Nerve Stimulation On Post-Stroke Aphasia: A Single-Subject Design Study, Aswathy Anakkathil Pradeep

LSU Doctoral Dissertations

Background: Anomia or word-retrieval difficulty is a common long-term language impairment for individuals with post-stroke aphasia. Several behavioral interventions like semantic feature analysis (SFA) have shown positive results in naming outcomes, but continue to face difficulty in generalizing the treatment effects to untreated items. With recent advancements in technology, researchers are developing newer neuromodulation devices that aim at promoting neuroplasticity and neural reorganization in post-stroke individuals. Transcutaneous auricular vagal nerve stimulation (taVNS) is a relatively new technology that aims at stimulating the auricular branch of the vagal nerve to promote neuroplasticity. Studies have shown taVNS to potentially facilitate positive improvements …

Evaluating Viability, Developmental Competence, And Chromatin Configurations Of Cryopreserved Equine Oocytes, Tricia Adams

LSU Doctoral Dissertations

Assisted reproduction technology and the use of specialized laboratories have increased in the horse breeding industry over the last decade. This expansion has highlighted the inability to routinely cryopreserve oocytes and preserve female genetics. Oocyte vitrification, a cryopreservation process, continues to be characterized as an experimental procedure in horses. The goal of this dissertation was to evaluate the viability, developmental competence, and nuclear structures of cryopreserved equine oocytes to illuminate potential areas of improvement in the vitrification process. Oocytes were collected from abattoir derived ovaries and exposed to either varying lengths of in vitro maturation (IVM) or pretreated with a …

Evaluation Of Nematicides For Management Of Plant-Parasitic Nematodes In Sugarcane, Iris M. Aguilar

LSU Master's Theses

Plant-parasitic nematodes (PPN) are an understudied threat in sugarcane production. Previous survey work showed that Tylenchorhynchus (stunt nematode), Pratylenchus (lesion nematode), Mesocriconema (ring nematode), and Helicotylenchus (spiral nematode) are the primary PPN genera found in sugarcane fields in Louisiana. This study evaluated the impact of nematodes on sugarcane growth and the effect of nematicides on nematode population densities. Greenhouse studies were conducted using soil collected from multiple sugarcane fields with moderate PPN infestation levels to determine the nematode impact on sugarcane growth and nematicide efficacy. Field soil collected from each site was subjected to four treatments: an untreated and sterilized …

Intensification Strategies Of Southern Arizona Bilinguals, Sadie E. Seilhan

LSU Master's Theses

The present thesis explores the intensification strategies employed by bilingual Spanish-English speakers in Southern Arizona, focusing on six distinct devices: lexical, phrasal, repetition, reformulation, hyperbole, and code-switching. While previous research has largely centered on adverbial and lexical intensifiers in monolingual contexts, this study broadens the scope by examining how bilingual speakers leverage their unique linguistic repertoire to amplify their speech. Using a sociopragmatic framework, the analysis reveals a marked preference for lexical intensification, which accounts for more than half of the recorded instances, with phrasal intensification and repetition following closely. Despite its lower frequency, code-switching stands out as a particularly …

Healthcare-Seeking Behavior In A Toxic Landscape: Investigating Cancer Care Awareness In Louisiana's Cancer Alley, Moumita Roy

LSU Master's Theses

The fossil fuel and petrochemical sector in the Louisiana region, known as "Cancer Alley," has a devastating impact not only on the environment but also on the health and lives of the local population. Extreme pollution from the petrochemical industry not only elevated cancer rates in this region but also maternal, reproductive, and newborn health harms, respiratory diseases, and other complex health issues. This study examined the healthcare-seeking behavior of some residents and their awareness of cancer facilities within a 100-mile radius of their homes and identified key challenges, such as proximity of cancer care and accessibility, financial constraints, and …

Command And Control Mechanisms For Post-Exploitation, Connor Hummel

LSU Master's Theses

The client-server model forms a core part of any existing network infrastructure. This interdependence between multiple client-server information systems means more vulnerabilities are open to exploitation. Once attackers gain control of an existing server, they can explore the vulnerabilities of a server system. To provide a more effective manner of defending against this type of persistent attack, this thesis aims to provide core information for understanding how post-exploitation of client-server systems works and an example attack scenario of a compromised system's behavior.

In this thesis, we identify several mechanisms used to control the attack flow and evade detection in the …

The Identity Of A Gymnast: How Health, Wellbeing, And Injury Become Embodied In The Identity Of Collegiate Gymnasts, Skyler M. Yakes

LSU Master's Theses

Gymnastics scholarship has traditionally focused on the physicality of the sport and what the body can and cannot do. This research expands upon gymnastics scholarship by exploring the individual experiences and histories of college gymnasts in the United States through a series of interviews. The goals of this research are to better understand the gymnastics experience and to explore health and wellbeing in gymnastics as it pertains to the formation of a gymnast’s identity. A combined approach using medical anthropology and anthropology of sport serves as a guiding framework for analyzing interview data. Definitions of health and wellbeing change between …

Exploring Pre-Service Teachers' Experiences With Emerging Technologies In Secondary Education: A Phenomenological Study, Richelle M. Decuir

LSU Doctoral Dissertations

This research was an investigation of the role of emerging technologies in preparing pre-service teachers to engage with secondary learners effectively. A phenomenological approach was utilized to explore how instructional design models and constructivist learning theories shape technology training in two Southeastern public universities. The research was focused on pre-service teachers' experiences developing digital competencies, integrating instructional design, and utilizing emerging technologies in educational settings. Data was collected through semi-structured interviews and demographic surveys to understand the participants’ perspectives comprehensively. The study findings revealed that while pre-service teachers recognize the value of technology in enhancing student engagement and supporting personalized …

Enhancing Writing By Increasing Metacognitive Skills Through Socratic Seminars In A High Poverty Middle School Social Studies Classroom: An Intrinsic Case Study, Kirsten Hickingbottom

LSU Doctoral Dissertations

The purpose of this intrinsic case study was to better understand the role metacognitive skills play within classroom settings to increase students’ writing through Socratic Seminars. A predominant question guided this study: Can improving student metacognition through the repetitive use of questioning techniques in Socratic Seminars lead to improved writing skills? This question, along with four additional research questions guided the research. There is a need for more activities that promote metacognition due to its correlation with academic achievement, critical thinking skills, problem-solving abilities, and perceived self-efficacy (Keus, 2020). The significance of this study was to examine a method of …

An In-Situ Method For Quantifying Entropy Generation In Fatigue Via A Novel Thermographic Approach, Peyton J. Wilson

LSU Master's Theses

This work features a new approach that is used to measure the rate of plastic work during a cyclic fatigue test, based on the first and second laws of thermodynamics. Using the one-dimensional Fourier heat equation coupled with the concept of fracture fatigue entropy, the rate of plastic work during fatigue can be measured without the need to interrupt a fatigue test, and the accumulated entropy to failure can be quantified. Experimental fatigue tests are conducted on Aluminum 6061-T6 specimens under cyclic axial loading and Carbon Steel 1018 specimens under fully reversed cyclic bending loading. The obtained results in addition …

Analyzing The Catfish And Trout Competitiveness Trends And Potential Trade Within The Us And Global Aquaculture Industry: A Gravity Model Approach, Diana Marisol Amaya Discua

LSU Master's Theses

The United States is one of the major seafood product importers in the world. Despite the increases in global seafood and aquaculture consumption over the past decades, there is limited information on the trade dynamics of this sector. To address this gap, this study uses an augmented gravity model to evaluate the factors that have influenced catfish and trout imports into the United States. The analysis was conducted using the Poisson Pseudo Maximum Likelihood (PPML) estimator to address issues of heteroskedasticity, autocorrelation, and zero trade flows. The results highlight the importance of Gross Domestic Product (GDP) and exchange rates in …

Advancing Data-Driven Disaster Debris Characterization And Quantification, Jasmine Bekkaye

LSU Doctoral Dissertations

Natural hazards generate tremendous amounts of debris that negatively impact communities and overwhelm waste management infrastructure. The challenge in disaster debris planning and management stems from inconsistent and scarce post-disaster debris quantity data due to the chaotic nature of recovery operations. This leads to a limited understanding of key factors influencing disaster debris generation across hazards and regions, hindering the accuracy and efficiency of modeling. With the increasing availability of comprehensive post-disaster waste datasets, the capacity to understand debris generation is expanding. This dissertation aims to fill knowledge gaps on disaster debris generation as follows: (1) investigate existing technologies for …

Examination Of Musical Sophistication And Working Memory Correlates In High School Students, Abby South

LSU Doctoral Dissertations

Abstract

The purpose of this study was to examine the relationship between musical engagement and cognitive ability in high school students. While musicians’ brains have long been of interest to those who study experience-dependent neuroplasticity, a lack of adolescent data grossly limits our understanding of the relationship between music training and observed neuroplastic changes in the brain. Advances in psychometric testing and brain imaging reveal relationships among musical expertise, changes in brain function, structure, and connectivity, and enhanced cognitive ability, but categorical groupings of dichotomously defined musicians and non-musicians prevent nuanced understanding of these complex relationships. In this study, 83 …

Rootzone Soil Moisture Dynamics Using Terrestrial Water-Energy Coupling, Vinit Sehgal, Binayak P. Mohanty, Rolf H. Reichle

Faculty Publications

A lack of high-density rootzone soil moisture (θRZ) observations limits the estimation of continental-scale, space-time contiguous θRZ dynamics. We derive a proxy of daily θRZ dynamics — active rootzone degree of saturation (SRZ) — by recursive low-pass (LP) filtering of surface soil moisture (θS) within a terrestrial water-energy coupling (WEC) framework. We estimate the LP filter parameters and WEC thresholds for the piecewise-linear coupling between SRZ and evaporative fraction (EF) at remote sensing and field scale over the Contiguous U.S. We use θS from the Soil Moisture Active-Passive (SMAP) satellite and 218 in-situ stations, with EF from the Moderate Resolution …

Workplace Bullying In Louisiana Academic Libraries: Exploring Worker Status And Demographics, Justin Savage, Andrea Hebert, Catherine Baird

Faculty Publications

Bullying is a phenomenon that exists across cultures, societies, and even species. It can be found everywhere, including the workplace. The present study investigates workplace bullying amongst an approximated census sample of Louisiana academic library workers. Using the Negative Acts Questionnaire—Revised (NAQ-R), the study explores the relationships between experiencing workplace bullying and librarian status, tenure status, years in the profession, age, gender, and race. Although no statistically significant relationships were found between variables, the findings add to a growing body of literature that explores the interrelations of demographic and environmental contexts and bullying experiences.

Extensions Of Open Science For Applied Behavior Analysis: Preregistration For Single-Case Experimental Designs, Matt Tincani, Shawn P. Gilroy, Art Dowdy

Faculty Publications

Open science practices are designed to enhance the utility, integrity, and credibility of scientific research. This article highlights how preregistration in open science practice can be leveraged to enhance the rigor and transparency of single-case experimental designs within an applied behavior analysis framework. We provide an overview of the benefits of preregistration including increased transparency, reduced risk of researcher bias, and improved replicability, and we review the specific contexts under which these practices most benefit the proposed framework. We discuss potential concerns with and unique considerations for preregistering experiments that use single-case designs, with practical guidance for researchers who are …

Health Literacy Directed Weight Loss Intervention In Primary Care Clinics, Terry Davis, Connie Arnold, Dachuan Zhang, Corby K. Martin, Robert L. Newton, Candice Myers, Kara D. Denstel, Emily F. Mire, Christoph Höchsmann, John Apolzan, Peter T. Katzmarzyk

Clinical Research Faculty Publications

BACKGROUND: Low income and low health literacy are associated with poorer health knowledge, health behaviors and poor health outcomes. The effectiveness of health literacy-directed weight loss treatment interventions in primary care clinics is lacking. OBJECTIVE: The aim of this study was to conduct a pragmatic cluster-randomized trial (PROmoting Successful Weight Loss in Primary CarE in Louisiana ([PROPEL]) to test the effectiveness of a 24-month, patient-centered, literacy-directed obesity treatment program delivered within primary care in an underserved population. This study reports the association between health literacy and program effectiveness, examining potential correlates of weight loss related to patient adherence to the …

When Old Meets New: Two Louisiana State University Outreach Librarians Build, Work, And Learn Together To Support Collaborative Student Engagement, Alia Kempton, Mitch Fontenot

Faculty Publications

No abstract provided.

Regulation Of Bacterial Virulence Genes By Pecs Family Transcription Factors, George C. Nwokocha, Arpita Ghosh, Anne Grove

Faculty Publications

Bacterial plant pathogens adjust their gene expression programs in response to environmental signals and host-derived compounds. This ensures that virulence genes or genes encoding proteins, which promote bacterial fitness in a host environment, are expressed only when needed. Such regulation is in the purview of transcription factors, many of which belong to the ubiquitous multiple antibiotic resistance regulator (MarR) protein family. PecS proteins constitute a subset of this large protein family. PecS has likely been distributed by horizontal gene transfer, along with the divergently encoded efflux pump PecM, suggesting its integration into existing gene regulatory networks. Here, we discuss the …

Comparative Transcriptomic Analyses Reveal Differences In The Responses Of Diploid And Triploid Eastern Oysters To Environmental Stress, Rujuta V Vaidya, Sarah Bodenstein, Dildorakhon Rasulova, Jerome F La Peyre, Morgan W Kelly

Faculty Publications

Triploid oysters are commonly used as the basis for production in the aquaculture of eastern oysters along the USA East and Gulf of Mexico coasts. While they are valued for their rapid growth, incidents of triploid mortality during summer months have been well documented in eastern oysters, especially at low salinity sites. We compared global transcriptomic responses of diploid and triploid oysters bred from the same three maternal source populations at two different hatcheries and outplanted to a high (annual mean salinity = 19.4 ± 6.7) and low (annual mean salinity = 9.3 ± 5.0) salinity site. Oysters were sampled …

Louisiana Agriculture Magazine, Fall 2024

Louisiana Agriculture

Questions drive the science behind the LSU AgCenter. Researcher Erin Oberhaus wanted to find data to help educate Louisiana horse owners about the use of an important medication, and a water quality specialist wondered if noneconomic bodies of water, which include agricultural ponds, might help people generate electricity. The research projects that grew from their questions are detailed in this issue of Louisiana Agriculture.

Also in this issue, scientists share the results from important soybean studies, and the AgCenter farm to school team shares success stories from school gardens across the state.

Research is at the core of the LSU …

Fall 2024 Catalog, Lsu Press

LSU Press Seasonal Catalogs

No abstract provided.

Scaling The Polymerization Of Polyaldehydes Through Continuous Flow Synthesis, Jared M. Schwartz, Paul A. Kohl, Anthony Engler

Faculty Publications

A plug flow reactor was constructed to scale the synthesis of metastable, phthalaldehyde-based polymers to achieve production rates of 1–2 kg per day. The flow-induced mixing and in-line polymerization quench and precipitation sequences resulted in improved polymer purity and long-term stability compared to the same materials made from a conventional batch process. Cryogenic rheology was used to probe the complex fluid dynamics encountered during the polymerization of PPA homopolymers. It is envisioned that this continuous flow manufacturing approach could be extended to other low ceiling temperature or aldehyde monomer systems to help implement and support a plastic circular economy. Graphical …

Prevailing Issues And Actions In Urban Best Practices Across Latin America And The Caribbean, Fabio Capra-Ribeiro

Faculty Publications

This research examines urban best practices (BPs) across Latin America and the Caribbean to illuminate the prevalent issues and actions associated with these locally implemented initiatives. An analysis of 45 BPs from the UN-Habitat repository was conducted using both quantitative and qualitative methods, organized into three phases. The first phase focused on collecting data such as BP sources, countries of origin, and years of implementation. The second phase identified common problems and actions within the BPs. The third phase involved a cross-sectional analysis to identify significant patterns and trends. The study found that many BPs originated from the Dubai International …

Formation And Microwave Losses Of Hydrides In Superconducting Niobium Thin Films Resulting From Fluoride Chemical Processing, Carlos G. Torres-Castanedo, Dominic P. Goronzy, Thang Pham, Anthony Mcfadden, Nicholas Materise, Paul Masih Das, Matthew Cheng, Dmitry Lebedev, Stephanie M. Ribet, Mitchell J. Walker, David A. Garcia-Wetten, Cameron J. Kopas, Jayss Marshall, Ella Lachman, Nikolay Zhelev, James A. Sauls, Joshua Y. Mutus, Corey Rae H. Mcrae, Vinayak P. Dravid, Michael J. Bedzyk, Mark C. Hersam

Faculty Publications

Superconducting niobium (Nb) thin films have recently attracted significant attention due to their utility for quantum information technologies. In the processing of Nb thin films, fluoride-based chemical etchants are commonly used to remove surface oxides that are known to affect superconducting quantum devices adversely. However, these same etchants can also introduce hydrogen to form Nb hydrides, potentially negatively impacting microwave loss performance. Here, comprehensive materials characterization of Nb hydrides formed in Nb thin films as a function of fluoride chemical treatments is presented. In particular, secondary-ion mass spectrometry, X-ray scattering, and transmission electron microscopy reveal the spatial distribution and phase …

The Past And Future Of The Fisheries And Marine Ecosystem Model Intercomparison Project, Camilla Novaglio, Andrea Bryndum-Buchholz, Derek P. Tittensor, Tyler D. Eddy, Heike K. Lotze, Cheryl S. Harrison, Ryan F. Heneghan, Olivier Maury, Kelly Ortega-Cisneros, Colleen M. Petrik, Kelsey E. Roberts, Julia L. Blanchard

Faculty Publications

Climate change is increasingly affecting the world's ocean ecosystems, necessitating urgent guidance on adaptation strategies to limit or prevent catastrophic impacts. The Fisheries and Marine Ecosystem Model Intercomparison Project (FishMIP) is a network and framework that provides standardised ensemble projections of the impacts of climate change and fisheries on ocean life and the benefits that it provides to people. Since its official launch in 2013 as a small, self-organized project within the larger Inter-Sectoral Impact Model Intercomparison Project, the FishMIP community has grown substantially and contributed to key international policy processes, such as the Intergovernmental Panel on Climate Change Assessment …

Determining Diabetic Kidney Disease Severity Using Traditional Chinese Medicine Syndrome Classification, Amanda Yun Rui Lam, Huang Fang Zheng, Kok Keong Teo, Xiao Hui Xin, Chieh Suai Tan, Jean Paul Kovalik, Sujoy Ghosh, Hong Chang Tan

Division of Basic Science Faculty Publications

No abstract provided.